奇异夸克对前向g0电子-质子散射实验中宇称破坏不对称性的贡献。
Strange-quark contributions to parity-violating asymmetries in the forward g0 electron-proton scattering experiment.
作者信息
Armstrong D S, Arvieux J, Asaturyan R, Averett T, Bailey S L, Batigne G, Beck D H, Beise E J, Benesch J, Bimbot L, Birchall J, Biselli A, Bosted P, Boukobza E, Breuer H, Carlini R, Carr R, Chant N, Chao Y-C, Chattopadhyay S, Clark R, Covrig S, Cowley A, Dale D, Davis C, Falk W, Finn J M, Forest T, Franklin G, Furget C, Gaskell D, Grames J, Griffioen K A, Grimm K, Guillon B, Guler H, Hannelius L, Hasty R, Hawthorne Allen A, Horn T, Johnston K, Jones M, Kammel P, Kazimi R, King P M, Kolarkar A, Korkmaz E, Korsch W, Kox S, Kuhn J, Lachniet J, Lee L, Lenoble J, Liatard E, Liu J, Loupias B, Lung A, MacLachlan G A, Marchand D, Martin J W, McFarlane K W, McKee D W, McKeown R D, Merchez F, Mkrtchyan H, Moffit B, Morlet M, Nakagawa I, Nakahara K, Nakos M, Neveling R, Niccolai S, Ong S, Page S, Papavassiliou V, Pate S F, Phillips S K, Pitt M L, Poelker M, Porcelli T A, Quéméner G, Quinn B, Ramsay W D, Rauf A W, Real J-S, Roche J, Roos P, Rutledge G A, Secrest J, Simicevic N, Smith G R, Spayde D T, Stepanyan S, Stutzman M, Sulkosky V, Tadevosyan V, Tieulent R, van de Wiele J, van Oers W, Voutier E, Vulcan W, Warren G, Wells S P, Williamson S E, Wood S A, Yan C, Yun J, Zeps V
机构信息
Department of Physics, College of William and Mary, Williamsburg, VA 23187, USA.
出版信息
Phys Rev Lett. 2005 Aug 26;95(9):092001. doi: 10.1103/PhysRevLett.95.092001.
We have measured parity-violating asymmetries in elastic electron-proton scattering over the range of momentum transfers 0.12 < or =Q2 < or =1.0 GeV2. These asymmetries, arising from interference of the electromagnetic and neutral weak interactions, are sensitive to strange-quark contributions to the currents of the proton. The measurements were made at Jefferson Laboratory using a toroidal spectrometer to detect the recoiling protons from a liquid hydrogen target. The results indicate nonzero, Q2 dependent, strange-quark contributions and provide new information beyond that obtained in previous experiments.
我们测量了在动量转移范围为0.12≤Q²≤1.0 GeV²内弹性电子-质子散射中的宇称破缺不对称性。这些不对称性源于电磁相互作用和中性弱相互作用的干涉，对质子电流中的奇异夸克贡献敏感。测量是在杰斐逊实验室使用环形光谱仪进行的，以探测来自液氢靶的反冲质子。结果表明存在非零的、与Q²相关的奇异夸克贡献，并提供了超越先前实验所得的新信息。
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